Captain Jigglypuff
*On Vacation. Go Away!*
The closest thing to Froslass we see on that route is wild Snorunt in Platinum. I think Froslass is one of those Pokémon that has never been available in the wild in the games like Rhyperior or Mew.Well come on, they definitely should be feeling cold there. But I don't think I've ever encountered a wild Froslass there... and even so I don't remember encountering one in any Pokémon game. But really the idea of freezing them to their deaths and putting them on display is just creepy.